An investigation was conducted to study the repassivation temperature of a highly alloyed austenitic (UNS S31254) and of a highly alloyed duplex (UNS S32750) stainless steel (SS). When initiated at a high temperature, repassivation occurred at a temperature level significantly lower than normally associated with initiation of crevice corrosion. Experimental results combined with computer modeling of crevice corrosion explored the mechanistic aspects. In this respect, the similarity between the hysteresis observed by cyclic polarization and cyclic temperature tests was emphasized.

Subject
Materials, Repassivation, Repassivation potentials, Corrosion initiation, Hysteresis, Platinum wire, Crevices, Resistors, Crevice corrosion, Electric potential, Corrosion resistance, Protection potential, Step potential
Keywords:
crevice corrosion, modeling, polarization, repassivation, stainless steel, temperature
NACE International
1995
You do not currently have access to this content.